New smart energy meters that the Government wants to be installed in millions of homes will leave householders vulnerable to cyber attacks. The intelligence agency GCHQ ... raised concerns over the security of the meters, which could enable hackers to steal personal details and defraud consumers by tampering with their bills. The Government wants every home in the country to have a smart meter, but only 8 million out of 27 million households have so far signed up to the 11 billion scheme. Cyber security experts say that making the meters universal will make them more attractive to hackers because the potential returns are so much greater if they can hack every meter using the same software. In some foreign countries hackers have already attacked smart meter networks to defraud customers. Criminals are able to artificially inflate meter readings, making bills higher. They then try to intercept payments, and if they simply skim off the difference between the real reading and the false reading, energy companies will think the bill has been paid normally. Another potential problem is the meters being used as a Trojan horse" to access other computers and gadgets around the home if the meters are able to "talk" to the other devices. That would potentially give hackers the ability to steal personal information that could be sold on to other criminals.